package com.henjie.test01;

import java.sql.*;

//我的第一个jdbc程序
public class JdbcDemo {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        //1、加载驱动
    Class.forName("com.mysql.jdbc.Driver"); //固定写法，加载驱动
        //2、用户信息和url
    String url = "jdbc:mysql://localhost:3306/jdbcstudy?useUnicode=true&characterEncoding=utf8&useSSL=false";
    String username = "root";
    String password = "chixin12356";
        //3、连接成功，数据库对象 Connection 代表数据库
       Connection connection = DriverManager.getConnection(url,username,password);
        //4、执行sql的对象 Statement 执行sql的对象
        Statement statement = connection.createStatement();
        //5、执行SQL的对象去执行SQL，可能存在结果，查看返回结果
        String sql = "SELECT * FROM users";

        ResultSet resultSet = statement.executeQuery(sql);  //返回的结果集,结果集中封装了我们全部的查询出来的结果。

        while (resultSet.next()){
            System.out.println("id=" + resultSet.getObject("id"));
            System.out.println("name=" + resultSet.getObject("NAME"));
            System.out.println("pwd=" + resultSet.getObject("PASSWORD"));
            System.out.println("email=" + resultSet.getObject("email"));
            System.out.println("birth=" + resultSet.getObject("birthday"));
            System.out.println("==================================================");
        }
        //6、释放连接
        resultSet.close();
        statement.close();
        connection.close();
    }
}
